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outer class

outer class

Nested Classes: Inner & Outer Class

The classes which are defined within another classes are known as Nested
Classes. These are also known as Inner Class. The Class in which
inner class resides are known as Outer Class. Inner Class has
access to the private member of the outer class. But the Outer Class
doesn't have access to the member of the inner class including public member
also.

Types of nested classes

Nested classes are of two types :

Static

Static nested classes are classes which is defined through static
modifier. Static nested classes can access the member of the it's outer
class through an object. Static inner classes can't access the member of the
outer class direclty.

Non Static

The non static classes have access to all the members of the it's outer
class.

Example

Given below example will give you clear idea about inner or outer classes :